/Engine/Source/Runtime/Engine/Classes/Materials/Material.h
virtual bool GetParameterValue ( EMaterialParameterType Type, const [FMemoryImageMaterialParameterInfo](API\Runtime\Engine\FMemoryImageMaterialParameterInf-) & ParameterInfo, [FMaterialParameterMetadata](API\Runtime\Engine\FMaterialParameterMetadata) & OutValue, EMaterialGetParameterValueFlags Flags ) const